Illuminating device for electric fixtures.



R. E. HOUGHTON III NI. I. HANLON. ILLUMINATINC DEVICE FOR ELECTRIC FIXTURES.

APPLICATION .FILED AUG.22 |916. y

Patented May 22, 1917.

RALPH E. HoUGHToN 4Ann MICHAEL J. HANLQN, or cLiiroNnALn, MASSACHUSETTS..

T0. all whom t may-concern Beit known-that we, RALPH E. I-IoUGHToN "..andzMicHAnn J. HANLoN,-both'citize1is fof- 'the United States, and residents of Cliftondale, in the county o'f'Essex and State of:

Massachusetts have invented a new and lmproved Illuminating Device for Electric Fixtures,'of which the following isa full, clear,

and exact description. 1'0

Oui' invention relates to a luminous-device for electric fixtures, andv'is'more parpendant vattachahle tofa pull-chain or the' like. TheA device includesymeans for vsecur- 15` f material, togetherwith-glass elements in 'a ticularly intended l for embodiment. in a ing the same tothe chain, -and luminous circular series` about the luminous surface.

'The glass elements preferablyareexact cylinders orelements' approximatelycylindrical in cross section andare tangent to a cylinf drical surfacebearing the luminous material so that by reason of the cylindrical surfaces the lightiwill be magnified 'as seen from any angle-'- Prime objects in view in .the production of our device are to obtain the maximum Y' illumination .from the luminous material tained regardless of variations in-'the diam?l and tov` produce v4an effective luminosity from a minimum quantity of luminous materiah.

eterwof the glass rod; to provide'a .device that may be securely attached to the chain with facility; and generally, to provide a 1 construction involving few partsof simple forms that may be readily assembled.

The invention will be particularly ex# vplained in the specific description following.

Reference is to be had to the accompany.- ing drawings forming apart of this specification in which similar reference characters indicate 'corresponding parts in all the views.

Figure 1 is a perspectiveview of our iinproved illuminating device;

vFig. 2 is a central'longitudinal sectionvo'n a larger s cale; l i

Fig. 8 is a cross section lon the line 3 8,

rig. 2;

. ILLUMINATING'DEV-ICE ELECTRIC FIXTURES.

specification oflletters Patent. Patented llay 2 2, 1917.` Application aiea'eugusizg, wie. seriaiin.v 116,363.

Fig.'4 is a cross section on the line 4 4, Fig. 2; f l

Fig. isa perspective view of a fastener element forming part of the device, and errgageable with the terminal of the pull chain.

VIn carrying out-our inventionin accord- 'ance with the "illustrated example, a tubular core or center 10 is formed preferably from ing over the tube vas at 14, Fig. 2.

brass'tubing and having a bore to permit the ready passage therethrough offballsjll -or 'equivalent -elements of .a chain-12. To the ,endsof the tube 10 heads 13 are secured in 1 iany suitable. manner as by rivetingl or flang- Glassgcylinders aredisposed in an an-v .nular's'eries about the tube 10parallel .with the axis of the tubeand tangent with the latter. -The-e'ndsof the heads 13 are formed -with conical flanges 16 to receive the ends of the cylindersA 15..` v The conical form ofthe flanges accommodates cylinders of varying diameteria'ndtherefore We may produce the cylinders 15 I lfrom ordinary commercial glass rods, the diameter of which may not be uniform.

.The tube 10'constitu`t es a ba se to receive luminous material 17 `which is applied theieto as a coating. vAny approved 'luminous material may be utilized, for examplefphos-v phoresc-e'nt calciuinsullite or .what is known as 4radium'ized material. The latter Imaterials are more expensive but have higher, illuminating properties and greater perma# n'ency, and we are enabled to employ the-- saine. without unduly increasing` the totalV cost of manufacturing the device owing to the comparatively small area of the tubelO, the effect ofthe elements 15 serving -to give f the necessary illumination so that vthe vdevice .when attached to a pull-chain will be distinctly luminous Ain the dark.

" '.loattach the device to a chain 12,`we`emA ploy a` hollow fastener plugv 18, 's aid plug i being openat the outer end and having a doi-11e shape at the innerend. major portion, the plug 18 is cylindrical to be snugly received in the cylindrical boi-e of the tube 10.- The outer end of the plug'. is flanged as at 19to contact with the adja,

cent head 13 and limit the inward movement of said plug. lAt one side, ai slot 20 is produced in the plug to'pa'ss across the For the Center ofthe donie shaped inner end. Said slot accommodates a link 12 or equivalent "I' element of the cliainso that-a Vball l1 or like vprotuberant partof the chain may be passed into the hollow interior 'of the plugv la and bear against the inner side of the dome thereof.

lt is to be understood that in practice" connect the same with a pulling medium, a

coating of luminous material on said core, cylindricalglas's elements in a circular series about the said coated core, and headsA on the core flanges clamping the said 4cyliiidrcalelements in position; i

2. An attachment of the class described 'including a cylindrical core, heads on the core, an exterior coating of luminous inaterial on the core, elements about the coated core, means to;v clamp said elements at their ends and -ineans to connect thev attachment with a iixture.

`said luminous materiaf' 3. .An attachment of' the classv described including' a core-, luminous material on lsaid core,l and a series of O'l'ass elements vabout 4. An attachment of the class ydescribed including a. core, luminous material on said core,- aseries of glass elements aboutsaid improved device tangent thereto, having` conical circular series of glassluminous material, and `heads on tliefsaid.-

core having flanges clamping the said clelments.

5. An attachment of the class described,

including a tubular core having a bore of a diameter to receive a A] oullcha1n, ahollow plug the interior of 'the plug accommodating a tting one endof the core and slotteiill at a side thereof for receiving a chain linie' relatively larger member'of the chain than the said'slot, luminous material about the vcore, and lglass elements about the saidv luminous material.4 v-

6. An attachment of the class described including` a .tubular coredadapted to receive a pulLChain, a vhollow plug fitting one end of the core, a slot at a side 'thereof for receiving a chain link, the' interiorl plug accommodating a' relativelyv larger of the member ofthe/chain than thelsaid slot,`

said plug having a radial flange bearing against the adjacent `end ofthe lcore, the said slot extending through said flange and transversely in the body oftheiplug beyond the center of luminous material, andmeans to hold said glass. elements 1n position.

7..An.attach1nent of the class'desoribed including a core, luminous material. about the core, and a series about the said material. RALPH E. HOUGHTON. MICHAEL J. HANLGN. Witnesses HENRY E. Ormea' LESLIE E. Passons.

the latter, luminous material about the core, glasselements 'about the said of glass cylinders 

